<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        {{ message }}
        <div>
            <input type="text" v-model="value">
            <div>{{value}}</div>
        </div>
      </div>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <script>
        var app = new Vue({
  el: '#app',
  data: {
    message: 'Hello Vue!'
    ,value:''
  }
})
    </script>
</body>
</html>